55722919 has 4 divisors (see below), whose sum is σ = 63683344. Its totient is φ = 47762496.

The previous prime is 55722869. The next prime is 55722929. The reversal of 55722919 is 91922755.

55722919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55722919 - 2⁷ = 55722791 is a prime.

It is a super-2 number, since 2×55722919² = 6210087403761122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55722929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3980202 + ... + 3980215.

It is an arithmetic number, because the mean of its divisors is an integer number (15920836).

Almost surely, 2^55722919 is an apocalyptic number.

55722919 is a deficient number, since it is larger than the sum of its proper divisors (7960425).

55722919 is an equidigital number, since it uses as much as digits as its factorization.

55722919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7960424.

The product of its digits is 56700, while the sum is 40.

The square root of 55722919 is about 7464.7785633601. The cubic root of 55722919 is about 381.9541966957.

The spelling of 55722919 in words is "fifty-five million, seven hundred twenty-two thousand, nine hundred nineteen".